Magnetic Field Lines Distribution Optimization And HSS Cutting Tools Strengthening Research

The improvement of cutting tool is one of the important research projects in the field of mechanical manufacturing. It is consistently thought that components’ working efficiency, surface quality and cost are determined by tool’s wear resistance and cutting performance, so many effective strengthening methods have been found. Because of having excellent combination properties, such as intensity, toughness, working properties and so on, high-speed steel(HSS) still plays an very important role in the mechanical manufacturing. The optimization of magnetization technics on W6Mo5Cr4V2 was studied through theoretical analysis and experimental demonstration, and the influencing factor of magnetization effect and the magnetization mechanism of HSS were also explored.This paper was based on the concept of green manufacturing. The magnetization unit, which was converted from a waste motor, was modeled and simulated by the finite element analysis software(ansoft), and measures of optimizing the distribution of the magnetic field generator were proposed. Based on the modeling and simulating results of the self-made AC magnetization unit and previous research achievements, the hardness of W6Mo5Cr4V2 high-speed steel magnetized by alternate magnetic field was studied by the orthogonal experimental method, and the influence rule on hardness of W6Mo5Cr4V2 high-speed steel under different experiment parameters was also analyzed, in which four factors included current frequency, field voltage, magnetization time and magnetic orientation were taken into. The magnetization parameters which were based upon the experimental data were optimized.The wear experiment of HSS under different magnetization parameters were carried out. and the wear surface morphology were observed by scanning electron microscope(SEM), the wear surface elements were tested by using energy dispersive spectrometer(EDS). The results indicated that the wear loss and friction coefficient of W6Mo5Cr4V2 HSS magnetized were decreased compared with those of the HSS without magnetizing, what is more, magnetization parameters played an important role in improving mechanical properties of W6Mo5Cr4V2 HSS. The combination effect of both magnetization treatment and applying loading could affect the oxidation wear of HSS, magnetization treatment could enhance the wear resistance more apparent when W6Mo5Cr4V2 HSS having wear test under lower load.In order to explore the effect of alternating magnetic treatment on the cutting performance of W6Mo5Cr4V2 high speed steel(HSS) cutting tool, the metallographic structure are observed by metallography microscope, and the cutting experiments were carried out in a universal machine tools with magnetized and non-magnetized high speed steel tool. The results indicated that magnetization parameters play an important role in the magnetic effect of W6Mo5Cr4V2 HSS cutting tool and the optimal treatment parameters have been found, in which the excitation voltage was 30 V, the current frequency was 5Hz, the processing time was 60 s. Magnetic treatment could improve the cutting performance of tool by adsorbing small chip to the material surface, the presence of oxygen had also a great effect on the work surface roughness.